Abstract: A scale weight combination selection system for selecting the most appropriate combination of scale weights for combinational weight machines. The system is best utilized in higher number order of scale machines and includes date stamping the scale weights as the scales are loaded, dividing the scale weights into two groups, one the earlier date stamps, and the other the later date stamps, calculating all combinations of scale weights in each group, assigning a digital code to each combination with code position representing scale number, ranking and sorting the digital codes in each group by a formula giving preference to the earliest date scale weights and the greatest number of scales in the combinations, adding the combinations, sequentially adding the combinations in one group to the combinations in the other groups in the ranked order, and selecting from the resulting combinations, the best combination of scale weights closest to a target weight.